Patrick meehan



Patented May 23, |899. P. MEEHAN.

BILER.

[Application led June 3, 1S98.\

v2 Sheets-Sheet I.

(No Model.)

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No. 625,406. 'Patented may 23, |899.

P. MEEHAN.

BILER.

(Applx'mtion- 1 ed June 3, 1898.) (No Model.) 2 Sheetsi-Sheet 2.

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NiTnD STATES PATENT OFFICE.

PATRICK MEEHAN, OF LOVELLVILLE, OHIO, ASSIGNOR TO THE MEEHAN BOILER ANDCONSTRUCTION COMPANY, OF SAME PLACE.

Bo'lLER.

SPECIFICATION forming part of Letters Patent No. 625,406, dated May 23,1899. Application'fled June 3, 1898. Serial No. 682,427. (No model.)

To all whom, it 77u53/ concern:

Beit known that I, PATRICK MEEHAN, a resident of Lowellville, in thecounty of Hahoning and State of Ohio, have invented a new and usefulImprovementin Boilers; and I do hereby declare the following to be afull, clear, and exact description thereof.

illy invention relates to steam-boilers.

One of the main objects of my inventionis to provide a verticalwater-tube boiler so constructed that the bent tubes which connect theupper and lower drums may be uniform in length, which does away with thenecessity of tubes of different lengths and bends.

My invention comprises the new and novel features set forth and claimedhereinafter.

To enable others skilled in the art to make and use my invention, I willdescribe the same more fully, referring to the accom panying drawings,in which Figure l is a sectional elevation of my improved boiler. Fig. 2is a like view from the side. Figs. S and 4L are views showing theinterior of the upper drum and the construction of the downflow-tubes.Fig. 5 is a cross-section of lower drum, and Fig. G is a plan view ofmud-drum.

Like letters indicate like parts in each of the figures.

The letter d designates a suitable furnace having the grate-bars d andsuitable openings for the introduction of fuel and the removal of ashes.The furnace, however, forms no part of my invention and any othersuitable construction may be used.`

Extending up from the furnace et is the shell or casing b, whichsurrounds myl improved boiler, said casing having the smokestack b atthe upper end thereof.

Fitted in the furnace ct are the drums c c', while at the upper end ofthe casing b is the drum d. These drums c, c', and d have the round endse, but intermediate of said ends are the fiat portions f. The lowerdrums c c each have one such iiat portion f, while theV upper drum d hasone on each side. These flat portions f have the openings forlnedtherein to receive the ends of the tubes 7L h. The

tubes h enter the openings in the drum c and the tubes 7L those in thedrum c'. The upper ends of the tubes enter the iiat portions on oppositesides of the upper drum d. With the tubes bent in substantially themanner shown it is apparent that by the use of the fiat portions f allthe tubes h h are of the same length and have the same bends.Furthermore, by having the tubes all of the same length there is nounequal expansion, and consequently there are no unequal strains. Theiiat portions f do not, however, interfere with the strength of thedrums, as they do not extend the entire length of said drums; but saiddrums have the regular round ends, which give strength and rigidity.

The downiiow-tubes i t" are preferably outside the casing b and enterthe round ends e of the drums. The downflow-tubes t" extend up withinthe upper drum d to about the water-line, and the upper ends of saidtubes are iiared outwardly, as at 7c. For the reasons more fullyhereinafter set forth the upper ends of the tubes i' have the shields m.

l/Vithin the lower drums c c are the m'uddrums fn. These mud-drums aresupported within the drums c c by the supports n'. The tops of thedrums'11, are perforated, and at each end thereof are the lids o, by means ofwhich access may be had to said drums for purposes of cleaning. Thelower ends of the downflow-tubes ft' t" enter the mud-drums n.

Leading from the drums c c are the blowoif pipes r, said pipesconnecting with the main blow-off pipe r'. Blow-off pipes r2 lead fromthe mud-drums n into the blow-off pipes r of larger diameter, both ofsaid pipes colnmunicating with the main blow-off r. By this constructionthe drums c c' and muddrums n may all be blown off at one time by simplyturning a valve in the main pipe r.

The letter s represents the ordinary manhole, provided With the covers', which is held in place in the ordinary manner by the bolt s2.Secured to the cover s' is the arm t, which has the roller t' journaledin its upper end. This roller t runs on the track t2, secured to By thisconstructhe interior of the drum.

tion when it is desired to gain access to the drum the cover is releasedfrom the bolt s2 and is then pushed back to the position shown in dottedlines, Fig. 4, the roller traveling on the track t2. In this manner allnecessity for the handling and lifting of the cover is avoided, and asthey weigh considerable and it is difficult and awkward to remove themthe advantage is at once apparent. To adjust the cover in place again,it Ais only necessary to draw it back and apply the bolt, as before.

When my improved boiler is in use, the water and steam pass up throughthe tubes h 77, as said tubes are exposed to the direct action of theheated products of combustion coming from the furnace. As the tubes h henter the upperdrum (Z intermediate of its ends, the Water in the upperdrum will be raised when said tubes enter and will fall olf toward theends, as illustrated by the dotted lines in Fig.

4. The water then descends by way of the doWnow-tubes z' i. As the tubest" extend up within the drum CZ to about the Water-line and adjacent tothe ends of the drum said tubes being unobstructed carry down the scumand other matter which floats on the surface of the water. The shieldsm, together with the daring ends of the tubes t', assist in theadmission of a greater quantity of water to said tubes. The waterpassing down the tubes i enters the mud-drums n, and the sediment isdeposited in said drums, the Water passing out through the perforationsinto the drums c c. In this manner the drums c c' are freed from agreatdeal of sediment. The sediment once deposited in the mud-drums n cannotwell escape, and the consequence is that the water circulating throughthe tubes is cleaner, and said tubes Will not clog up so readily. Whenit is desired to blow o the drums and mud-drums, it can all be donethrough the one main pipe.

All the tubes h h', or the upfloW-tubes, can `be made of the same lengthand bend, so that in constructing the boiler tubes of different lengthsand bends do not have to be employed. This is a great advantage, as thetubes can be made and bent in large quantities and in less time, Whileat the same time if a tube is to be replaced it can be readily obtained.The dat portions for the insertion of the tubes being intermediate ofthe ends permits of the regular round ends on the drums, so that saiddrums are not weakened by said fiat portions, but the ends are rigid andfirm.

What I claim as my invention, and 4desire to secure by Letters Patent,is-

l. In a boiler, drums having flat portions intermediate of their endsand round ends, and tubes connecting said drums, substantially as setforth.

2. In a boiler, drums having fiat portions intermediate of their endsand round ends, and bent tubes connecting said drums, substantially asset forth. j

3. In a boiler, upper and lower drums, tubes connecting same, a mud-drumin the lower drum having perforations therein, the downflow-tubesentering said mud-drum, substantially as set forth.

4. In aboiler, upper and lower drums, tubes connecting same, a mud-drumin the lower drum and communicating with the lower drum, thedownflow-tubes entering said muddrums, a blow-off pipe leading from saidlower drum, and a blow-off pipe leading from said mud-drum into saidfirst-mentioned blow-off pipe, said blow-off pipes communicating with amain blow-off pipe, substantially as set forth. o i

5. In a boiler, upper and lowerdrums, tubes connecting same, the downflow-tubes having unobstructed openings and extending up Within theupper drum, substantially as set forth.

6. In aboiler, upper and lowerdrums, tubes connecting same, thedoWniiow-tubes having unobstructed openings and extending up Within theupper drum to the water-line, substantially as set forth.

7. In aboiler, upperand lowerdrums, tubes 'connecting same, thedoWnflow-tubes extending up within the upper drum, said downflowtubeshaving outwardly- Haring ends, substantially as set forth.

8. In a boiler, upper andlowerdrums, tubes connecting same, the downflow-tubes extend'- ing up within the upper drum, and shields at theupper ends of said downflow-tubes, substantially as set forth.

In testimony whereof I, the said PATRICK MEEHAN, have hereunto set myhand.

PATRICK MEEHAN.

IVitnesses:

RoBr. D. TorrEN, JAMES I. KAY.

IOO

